US6371442B1 - Fluid flow regulator - Google Patents

Fluid flow regulator Download PDF

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Publication number
US6371442B1
US6371442B1 US09/618,161 US61816100A US6371442B1 US 6371442 B1 US6371442 B1 US 6371442B1 US 61816100 A US61816100 A US 61816100A US 6371442 B1 US6371442 B1 US 6371442B1
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United States
Prior art keywords
carriage
main body
outlet port
rotor
sphere
Prior art date
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Expired - Fee Related
Application number
US09/618,161
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English (en)
Inventor
Tetsuhiko Hara
Shingo Tanaka
Hideo Sasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Instruments Corp
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Sankyo Seiki Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO reassignment KABUSHIKI KAISHA SANKYO SEIKI SEISAKUSHO ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HARA, TETSUHIKO, SASAKI, HIDEO, TANAKA, SHINGO
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
    • H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/12—Sound
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/17—Size reduction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to improvements of a fluid flow regulator incorporating a stepping motor or the like as a driving source for opening/closing a valve.
  • the flow regulator using a solenoid valve generally effects the setting of either opening or closing, and is not suitable for fine regulation of the flow rate.
  • large noise is made when the valve is opened or closed.
  • the solenoid valve when the solenoid valve is in either an open or a closed state, the solenoid valve needs to be set in an energized state to maintain that state, so that there is a problem in terms of power consumption as well.
  • the flow rate of a fluid is controlled by using a stepping motor or the like as a driving source, and by converting the rotational force of the stepping motor using the thrust of the needle valve.
  • the problem of the operating noise is small, and it is possible to finely regulate the flow rate.
  • the size of the motor as a driving source is generally large. Conceivably, this is mainly due to the fact that many of these apparatuses are used for controlling the flow rate of a refrigerant in air conditioners or the like. Namely, in the case of the air conditioner, since the pressure difference between the inlet side of the refrigerant and the outlet side thereof when the refrigerant is interrupted, it is necessary to move the needle valve with large thrust. Consequently, the size of the motor inevitably becomes large for driving the valve.
  • the apparatus using the needle valve is used as it is as the apparatus for controlling the flow rate of a refrigerant in a refrigerator or the like
  • various compartment parts are required to be as small as possible to provide a large space for a food compartment.
  • the flow regulator for the refrigerant is also naturally required to be as compact as possible. Nevertheless, if the motor size is reduced, a problem arises in that torque necessary for effecting reliable flow-rate control cannot be obtained.
  • an object of the invention is to provide a fluid flow regulator which is simple in structure and compact, which makes it possible to effect reliable flow-rate control of a fluid, and which produces practically no operating noise during control.
  • the spherical face of the sphere held in the carriage is brought into contact with the fluid outlet port provided in the main body so as to set the fluid outlet port in a closed state. Meanwhile, as the carriage is moved away from the fluid outlet port, the spherical face of the sphere is set in a state of non-contact with respect to the fluid outlet port so as to set the fluid outlet port in an open state. Accordingly, it is possible to effect reliable flow regulation control (particularly, control for stopping or allowing the flow of a fluid) with a simple structure.
  • FIG. 1 is a side cross-sectional view of a fluid flow regulator in accordance with an embodiment of the invention
  • FIG. 2 is a side elevational view illustrating the fluid flow regulator
  • FIG. 3 a front elevational view taken in the direction of the arrow A shown in FIG. 2;
  • FIG. 4 is a side cross-sectional view illustrating a bearing attached to a main body of the fluid flow regulator shown in FIG. 1;
  • FIG. 5A is a plan view illustrating a rotor of a stepping motor used in the fluid flow regulator shown in FIG. 1;
  • FIG. 5B is a side cross-sectional view of the rotor
  • FIG. 6A is a plan view illustrating a holder used in the fluid flow regulator shown in 1 ;
  • FIG. 6B is a side elevational view taken in the direction of the arrow B shown in FIG. 6A;
  • FIGS. 7A and 7B are front view showing modifications of a communication passage in the bearing used in the fluid flow regulator shown in FIG. 1 .
  • FIGS. 1 to 7 a description will be given of an embodiment of the invention.
  • FIGS. 1 to 3 illustrate the overall construction of a fluid flow regulator in accordance with an embodiment of the invention.
  • FIG. 1 is a side cross-sectional view
  • FIG. 2 is a side elevational view illustrating an external configuration
  • FIG. 3 is a front elevational view taken in the direction of the arrow A in FIG. 2 .
  • a fluid regulator 1 shown in FIGS. 1, 2 , and 3 comprises a main body 2 ; a motor (since a stepping motor is used in this embodiment, the motor will be hereafter referred to as the stepping motor) 3 attached to a rear end portion of the main body 2 and serving as a driving source for opening/closing a valve (details of which will be described later); an inlet pipe (hereafter referred to as the inlet pipe) 4 on the inlet side of a fluid; and a pipe (hereafter referred to as the outlet pipe) 5 on the outlet side of the fluid, which are attached to a front end portion of the main body 2 .
  • the stepping motor 3 comprises a stator 32 with a coil 31 wound therearound; a rotor 33 disposed inside the stator 32 in a face-to-face relation thereto; and a rotary shaft 34 rotatably supported in a shaft supporting hole 33 a extending in the direction of the central axis of the rotor 33 .
  • stator 32 With the coil 31 wound therearound is accommodated in a stator casing 38 which is detachably fitted with the main body 2 by means of a holder 40 (described later). It should be noted that the stator 32 is so structured that the coil 31 is formed integrally with pole teeth or the like of the stator 32 by means of a resin, and the coil 31 is sealed.
  • the main body 2 is formed of brass of a hollow cylindrical shape, and a bearing 21 for rotatably supporting the rotary shaft 34 of the stepping motor 3 is press-fitted into its interior on the rear-end portion thereof. Further, a flange plate 22 which is joined to the main body 2 by brazing (the joined portion is designated at W) is provided at a rear end portion of the main body 2 .
  • a rotor casing 23 for accommodating the rotor 33 of the stepping motor 3 is welded to the flange plate 22 by using a tungsten inert gas (TIG).
  • TIG tungsten inert gas
  • the flange plate 22 and the rotor casing 23 are formed of a stainless steel (SUS), and will be collectively referred to as the rotor casing assembly.
  • the rotary shaft 34 of the stepping motor 3 is rotatably supported by the bearing 21 of the main body 2 , and external threads are formed on the shaft portion of the rotary shaft 34 . Meanwhile, internal threads are formed on an inner periphery of a shaft supporting hole 21 a of the bearing 21 , and the external threads and internal threads are in mesh with each other.
  • the rotating direction of the rotor 33 for advancing the rotary shaft 34 in the inserting direction of the main body 2 will be herein referred to as forward rotation.
  • the rotor 33 and its rotary shaft 34 move in the direction toward the rear end side of the main body 2 .
  • the rotor casing 23 may be provided with an unillustrated restricting member so as to stop the rotor 33 at a proper position with respect to the stator 32 at the time of this movement toward the rear end side.
  • a carriage 24 is attached to a front end of the rotary shaft 34 .
  • This carriage 24 moves inside the main body 2 together with the rotary shaft 34 in conjunction with the forward and reverse rotation of the rotor 33 .
  • a sphere 25 serving as a valve is accommodated inside the carriage 24 and in the vicinity of a front end of the carriage 24 , and a coil spring 26 serving as a resilient member is interposed between the sphere 25 and the rotary shaft 34 .
  • a plate 27 is interposed between the sphere 25 and the coil spring 26 , and a force for pressing the sphere 25 in a direction toward the front end of the carriage 24 is imparted to the sphere 25 by the extending force of the coil spring 26 .
  • the front end of the carriage 24 is opened so that a portion of the spherical face of the sphere 25 is exposed from the carriage 24 .
  • the load of the coil spring 26 at the time of assembling is set to such a load that the sphere 25 does not vibrate under the pressure of the fluid in actual use.
  • the flow of the refrigerant which enters the main body 2 through the inlet pipe 4 and flows out to the outlet pipe 5 via the fluid outlet port 28 , is controlled as the sphere 25 assumes a state of contact or a state of non-contact with the fluid outlet port 28 in conjunction with the movement of the carriage 24 .
  • the invention is suitable for use in a case where setting is provided to assume either a state in which the refrigerant is allowed to pass or a state in which its flow is stopped, i.e., an on state (the state in which the refrigerant is allowed to pass) or an off state (the state in which the flow of the refrigerant is stopped).
  • an on state the state in which the refrigerant is allowed to pass
  • an off state the state in which the flow of the refrigerant is stopped
  • a fluid outlet port 28 provided in the front end portion of the main body 2 is adapted to set the refrigerant flow in the off state as the spherical face of the sphere 25 held in the carriage 24 is brought into contact with the fluid outlet port 28 .
  • that portion of the fluid outlet port 28 which abuts against the sphere 25 is provided with a curved face (concave face) having the same curvature as that of the spherical face of the sphere 25 .
  • This curved face can be obtained by firmly pressing a sphere having the same shape as the sphere 25 against the relevant portion of the fluid outlet port 28 so as to transfer the shape during a fabrication stage.
  • the bearing 21 has a communication passage 21 c which extends from one end face 21 d of the bearing 21 to the other end face 21 e thereof in such a manner as to be parallel to the shaft supporting hole 21 a .
  • an outer diameter d 1 of the main body 2 on its front end side in the press-fitting direction is made slightly smaller than an outer diameter d 2 thereof on its rear end side. Cuttings which are produced during the press-fitting of the bearing 21 can be received on a stepped portion defined by this difference in the outer diameter.
  • this bearing 21 is press-fitted to the main body 2 in a state in which the rotary shaft 34 is screwed into the bearing 21 , and the carriage 24 (with the sphere 25 , the plate 27 , and the coil spring 26 accommodated in the carriage 24 ) has already been attached to the front end of the rotary shaft 34 .
  • the communication passage 21 c of the bearing 21 is an air-venting through hole used when the interior of the rotor casing 23 is set in a state of vacuum, and this communication passage 21 c is also used as an introducing channel when a Freon gas as a refrigerant is charged after the evacuation.
  • the operation of attaching the bearing 21 to the main body 2 and the operation of charging the Freon gas are effected in a state in which the rotary shaft 34 is already in the state of being attached to the bearing 21 , but the rotor 33 is not yet attached to the rotary shaft 34 .
  • the rotor 33 includes a hollow cylindrical member 331 made of a synthetic resin and a magnet 332 fitted to its periphery.
  • the shaft supporting hole 33 a into which the rotary shaft 34 is detachably inserted is provided in a central portion of the hollow cylindrical member 331 .
  • a large-diameter section having an inner diameter larger than the shaft supporting hole 33 a is formed on an end portion 33 c side of the shaft supporting hole 33 a on the bearing 21 side.
  • This large-diameter section includes a first large hole 333 and a second large hole 334 formed between the first large hole 333 and the end portion 33 c and having a diameter larger than the first large hole 333 .
  • a slit 335 which linearly passes through the second large hole 334 and the first large hole 333 is formed in side walls of the first large hole 333 and the second large hole 334 .
  • an engaging member (not shown) which engages the slit 335 is provided on the rotary shaft 34 .
  • the rotary shaft 34 is inserted in the through hole 33 a of the hollow cylindrical member 331 of the rotor 33 , the rotary shaft 34 is inserted in the through hole 33 a such that the engaging member enters the slit 335 . Consequently, the engaging member of the rotary shaft 34 advances to a terminating portion of the first large hole 333 by using the slit 335 as a guide, and further insertion of the rotary shaft 34 is restricted there. Then, the rotary shaft 34 and the rotor 33 are engaged with each other by this engaging member, and are arranged to be rotatable as a unit.
  • stator 32 with the coil 31 wound therearound is fitted over the rotor casing assembly in such a manner as to cover the outer periphery of the side face of the rotor casing assembly.
  • This stator 32 is fitted to the main body 2 in a state in which the stator 32 is accommodated in the stator casing 38 .
  • the stator casing 38 is held by the holder 40 in such a manner as to be detachable from the main body 2 .
  • the holder 40 includes a pair of curved resilient pieces 40 a and 40 b which are curved and are adapted to hold the main body 2 by their resiliency, as well as a resilient piece 40 d for holding the stator casing 38 extending orthogonally from a bifurcating portion of the curved resilient pieces 40 a and 40 b and having a retaining pawl 40 c at its distal end.
  • a pair of projections 40 e and 40 f are respectively formed on the curved resilient pieces 40 a and 40 b by cutting out portions of the curved resilient pieces 40 a and 40 b in the U-shape and by bending the cutout portions inwardly. Meanwhile, as shown in FIG.
  • a step portion 2 a for accommodating the curved resilient pieces 40 a and 40 b is formed in the main body 2 so that the curved resilient pieces 40 a and 40 b , when fitted on the outer periphery of the main body 2 , do not slide in the axial direction along the outer periphery of the main body 2 .
  • a step portion 38 a to be engaged with the retaining pawl 40 c provided at a distal end of the holding piece 40 d is formed on the stator casing 38 .
  • the above-described holder 40 is held on the main body 2 in such a manner as to clamp the outer periphery of the main body 2 by the resiliency of the curved resilient pieces 40 a and 40 b.
  • the projections 40 e and 40 f provided on the curved resilient pieces 40 a and 40 b assume a state of apparently biting into the main body 2 , the holder 40 is prevented from moving in the circumferential direction.
  • the movement of the holder 40 in the axial direction of the main body 2 i.e., in directions toward the front end and the rear end of the main body 2 , is restricted by the step portion 2 a provided in the main body 2 , a reliably held state is obtained.
  • stator casing 38 with the stator 32 accommodated therein is attached to the main body 2 .
  • stator casing 38 is slid toward the main body 2 in such a manner that the rotor casing 23 already joined to the main body 2 is inserted into the central space of the stator casing 38 .
  • the retaining pawl 40 c of the holding piece 40 d snaps onto the step portion 38 a provided on the stator casing 38 due to its resiliency.
  • the stator casing 38 is held on the main body 2 by the resiliency of the holding piece 40 d .
  • the stator casing 38 can be removed if it is strongly pulled in the direction in which it is detached from the main body 2 .
  • stator casing 38 can be attached to or detached from the main body 2 with one-touch operation in the above-described manner, the maintenance of the stator 32 , the coil 31 portion, the power supply unit 36 portion connected to them, or the like can be facilitated.
  • the coil 31 is set in an energized state to forwardly rotate the rotor 33 of the stepping motor 3 .
  • the rotor 33 forwardly rotates, and the rotating force of the rotor 33 is transmitted to the rotary shaft 34 , so that the rotary shaft also rotates forwardly.
  • both the rotor 33 and the rotary shaft 34 move linearly inside the main body 2 toward its front end. Then, the sphere 25 inside the carriage 24 attached to the front end of the rotary shaft 34 is brought into contact with the fluid outlet port 28 provided in the front end portion of the main body 2 .
  • the spherical face of the sphere 25 is brought into face-contact with the curved face formed at the fluid outlet port 28 , thereby making it possible to reliably stop the flow of the refrigerant. It should be noted that although the driving of the stepping motor 3 may be stopped in this state, the driving is normally continued further to absorb the assembly error or the like.
  • a member is generally provided such as by providing a stopper or the like to prevent a force for further moving the valve from being applied at the same time as the valve has reached the closing position, or by providing the motor with a friction mechanism whereby in the event that a further undue force is applied although the valve has been set in the closed state, the rotor is made to idle to prevent the valve from being driven further.
  • the arrangement provided is such that the force for pressing the sphere 25 is absorbed by the coil spring 26 , and it is therefore possible to prevent the carriage from becoming locked.
  • a force for pressing the fluid outlet port 28 with a fixed force or more is applied to the sphere 25 by the expansion force of the coil spring 26 , and a force for pressing the sphere 25 against the front end portion of the carriage 24 is constantly applied to the sphere 25 to allow a reliable state of contact to be obtained. Therefore, the back-lash of the sphere 25 inside the carriage is prevented. Consequently, it is possible to prevent the sphere 25 from vibrating due to the pressure of the refrigerant, thereby making it possible to prevent the occurrence of noise due to the vibration of the sphere 25 .
  • the rotating force of the rotor 33 is transmitted to the rotary shaft 34 , which undergoes the reversely rotating, operation together with the rotor 33 , and moves in the direction of coming off the main body 2 .
  • the stepping motor 3 operates a predetermined number of steps
  • the sphere 25 engages the front end portion of the carriage 24 .
  • the sphere 25 starts to move together with the carriage 24 , and is disengaged from the fluid outlet port 28 , thereby assuming the state in which the refrigerant is allowed to flow (on state).
  • the off state is maintained since the sphere 25 is held in contact with the fluid outlet port 28 by the urging force of the coil spring 26 . Then, when the sphere 25 engages the carriage 24 and moves even slightly from the fluid outlet port 28 , the valve is set in a fully open state by the sphere 25 , and the refrigerant quickly starts to flow. In other words, it is possible to change over the refrigerant flow digitally from the off state to the on state.
  • the spherical face of the sphere 25 held in the carriage 24 is brought into contact with the fluid outlet port 28 provided in the main body 2 so as to set the fluid outlet port 28 in the closed state.
  • the spherical face of the sphere 25 assumes a state of non-contact with respect to the fluid outlet port 28 , thereby effecting the operation of setting the fluid outlet port 28 in the open state.
  • the front end of the rotary shaft 34 on the sphere 25 side projects through a small hole portion 24 a of the carriage 24 , in which the coil spring 26 is inserted, and reaches a large hole portion 24 b .
  • an inclined face is provided between the small hole portion 24 a and the large hole portion 24 b .
  • the distance between the plate 27 and the front end of the rotary shaft 34 when the sphere 25 has come into contact with the front end portion of the carriage 24 is set to about 0.84 mm.
  • the coil spring 26 is used as the spring for imparting a force for pressing the sphere 25 against the front end portion of the carriage 24
  • this pressurizing spring may not be the coil spring.
  • the communication passage 21 c provided in the bearing 21 may be not a hole with a circular cross section.
  • the communication passage 21 c may have a rectangular cross section, as shown in FIG. 7 A.
  • this communication passage 21 c may be a groove formed in a side face of the bearing 21 in such a manner as to extend from one end face 21 d to the other end face 21 e.
  • the holder 40 for holding the stator casing 38 onto the main body 2 is not limited to the structure of the above-described embodiment, and another structure may be adopted insofar as an engaging relationship can be obtained which allows the holding piece 40 d and the stator casing 38 to be reliably held with a single motion.
  • the projections 40 e and 40 f of the holder 40 may not be formed in the shape of pawls, and may be formed in a projecting shape, or the retaining pawl 40 c of the holder 40 may be changed to another shape such as an acute-angled shape.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Lift Valve (AREA)
  • Details Of Valves (AREA)
US09/618,161 1999-07-16 2000-07-17 Fluid flow regulator Expired - Fee Related US6371442B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11202632A JP2001027362A (ja) 1999-07-16 1999-07-16 流体の流量制御装置
JP11-202632 1999-07-16

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US6371442B1 true US6371442B1 (en) 2002-04-16

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JP (1) JP2001027362A (ja)
KR (1) KR100387974B1 (ja)

Cited By (7)

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US20050253101A1 (en) * 2004-05-17 2005-11-17 Schaupp John F Needle valve construction
US20060118752A1 (en) * 2004-12-07 2006-06-08 Lin Tin-Kai Loading structure for a valve
US20090049671A1 (en) * 2007-08-23 2009-02-26 O'hara Dennis Eugene Apparatus to connect a valve stem to a valve member
US20190078822A1 (en) * 2018-10-11 2019-03-14 Custom Controls Company Refrigeration Capacity Control Device
EP3672030A1 (en) * 2018-12-20 2020-06-24 Danfoss A/S Valve, in particular expansion valve
US12072039B2 (en) 2018-12-20 2024-08-27 Danfoss A/S Electric expansion valve
US12117215B2 (en) 2018-12-20 2024-10-15 Danfoss A/S Valve having a motor arranged inside a tube having sections with different diameters

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100598327B1 (ko) * 2005-03-30 2006-07-10 주식회사 모아텍 전동 밸브

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US2589183A (en) * 1948-11-12 1952-03-11 Zielinski Joseph High-pressure jet nozzle
US4650156A (en) * 1984-05-30 1987-03-17 Fuji Koki Manufacturing Co., Ltd. Sealed type motor-operated flow control valve
US4723754A (en) * 1985-11-19 1988-02-09 Mitsubishi Denki K.K. Flow rate control valve system
US4948091A (en) * 1989-02-17 1990-08-14 Kabushiki Kaisha Yaskawa Denki Seisakusho Motor-operated valve
US5024418A (en) * 1989-09-07 1991-06-18 Eaton Corporation Fluid flow rate control device
US5137255A (en) * 1990-06-15 1992-08-11 Mitsubishi Denki K.K. Control valve device
US5318064A (en) * 1993-09-24 1994-06-07 Marotta Scientific Controls, Inc. Motor-operated valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2589183A (en) * 1948-11-12 1952-03-11 Zielinski Joseph High-pressure jet nozzle
US4650156A (en) * 1984-05-30 1987-03-17 Fuji Koki Manufacturing Co., Ltd. Sealed type motor-operated flow control valve
US4723754A (en) * 1985-11-19 1988-02-09 Mitsubishi Denki K.K. Flow rate control valve system
US4948091A (en) * 1989-02-17 1990-08-14 Kabushiki Kaisha Yaskawa Denki Seisakusho Motor-operated valve
US5024418A (en) * 1989-09-07 1991-06-18 Eaton Corporation Fluid flow rate control device
US5137255A (en) * 1990-06-15 1992-08-11 Mitsubishi Denki K.K. Control valve device
US5318064A (en) * 1993-09-24 1994-06-07 Marotta Scientific Controls, Inc. Motor-operated valve

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7168678B2 (en) * 2004-05-17 2007-01-30 Illinois Tool Works Inc. Needle valve construction
US20050253101A1 (en) * 2004-05-17 2005-11-17 Schaupp John F Needle valve construction
US20060118752A1 (en) * 2004-12-07 2006-06-08 Lin Tin-Kai Loading structure for a valve
US20090049671A1 (en) * 2007-08-23 2009-02-26 O'hara Dennis Eugene Apparatus to connect a valve stem to a valve member
US8146883B2 (en) * 2007-08-23 2012-04-03 Fisher Controls International Llc Apparatus to connect a valve stem to a valve member
US10753657B2 (en) * 2018-10-11 2020-08-25 Custom Controls Company, a Texas corporation Refrigeration capacity control device
US20190078822A1 (en) * 2018-10-11 2019-03-14 Custom Controls Company Refrigeration Capacity Control Device
EP3672030A1 (en) * 2018-12-20 2020-06-24 Danfoss A/S Valve, in particular expansion valve
WO2020126203A1 (en) * 2018-12-20 2020-06-25 Danfoss A/S Valve, in particular expansion valve
CN113196622A (zh) * 2018-12-20 2021-07-30 丹佛斯有限公司 阀、特别是膨胀阀
CN113196622B (zh) * 2018-12-20 2024-03-26 丹佛斯有限公司 阀、特别是膨胀阀
US12072039B2 (en) 2018-12-20 2024-08-27 Danfoss A/S Electric expansion valve
US12117215B2 (en) 2018-12-20 2024-10-15 Danfoss A/S Valve having a motor arranged inside a tube having sections with different diameters

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KR20010049699A (ko) 2001-06-15
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